JPH08331675A - Digital button telephone device - Google Patents

Abstract

(57) [Summary] [Purpose] After limiting the number of dedicated station lines to specific terminals,
It is possible to secure a large traffic capacity for communication of a specific terminal. [Structure] A main extension 2 (extension telephone 3) and a single telephone extension 4 (FAX terminal 5) are fixedly assigned to each channel of the main extension PCM highway 19. On the PCM highway 21 for the extension of the additional single telephone, only the extension of the single individual telephone 7 (additional FAX terminal 8) is provided for only some channels.
Assign In the PCM A / D unit 14, for the main PCM highway 17, in the channel corresponding to the channel to which the additional single-telephone extension 7 is assigned in the PCM highway 21 for the additional single-telephone extension, the caller I
The main extension highway 19 and the additional independent telephone extension PCM highway 21 are selected depending on whether or not the caller number indicated by the caller ID received by the D receiving unit 27 matches the telephone number registered in advance. Connect to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital connection for exchanging information transmitted on a plurality of channels set in a digital information multiplexing highway by exchanging channels by exchanging means. Button telephone device.

[0002]

2. Description of the Related Art A digital key telephone device of this type is
A digital information multiplexing highway is time-divided to set a plurality of digital information channels, and terminals and station lines are fixedly assigned to each digital information channel. Then, in the interface unit for interfacing between the terminal and the office line, the information (for example, PCM data) given from the terminal or the office line is output to the corresponding digital information channels. The information output to the digital information multiplexing highway in this way is transferred to the digital information channel corresponding to the connection destination terminal or station line at the time switch and is given to the connection destination terminal or station line. .

By the way, when a FAX terminal or the like is connected to such a digital key telephone device, one of the connected office lines is set exclusively for FAX communication, and when an incoming call occurs through this office line. Connects this station line to a FAX terminal.

However, if the number of station lines that can be used for FAX communication is limited to one, it is not possible to cope with an increase in the traffic volume of FAX communication, and the frequency of busy state increases. If this problem is solved by increasing the number of station lines dedicated to FAX communication, the problem arises that the communication cost increases with respect to the total communication traffic volume.

[0005]

As described above, in the conventional digital button telephone apparatus, when a special terminal such as a FAX terminal is connected, the terminal must be provided with a dedicated station line for communication. However, if the number of dedicated station lines is small, it will not be able to cope with the increase in traffic volume and will be in a busy state more frequently, and if a dedicated line is added to reduce traffic volume, communication cost will increase. There was a problem of doing.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to reduce the number of dedicated office lines to a specific terminal and to provide traffic related to communication of the specific terminal. It is an object of the present invention to provide a digital key telephone device capable of ensuring a large capacity.

[0007]

To achieve the above object, the present invention provides a first PCM highway or the like.
A plurality of channels similar to the information highway are set, some predetermined channels of the plurality of channels are set to specific channels, and the other are set to normal channels, and each of the plurality of channels is set to, for example, A second information highway, such as a PCM highway for the main extension, to which a standard extension such as a main extension or a single telephone extension is fixedly assigned, and a plurality of channels similar to the first information highway are set and the second information highway is set. For example, an additional specific telephone set in which a specific extension such as an additional single telephone line extension is fixedly allocated only to a predetermined effective channel that is synchronized with the information highway and has the same timing as the specific channel among the plurality of channels. Third information highway such as extension PCM highway and subscribers such as station lines It is notified via e.g. Caller I
The information highway control means includes call information receiving means such as a caller ID receiving section for receiving call information such as D, and information highway control means including a PCM highway channel demultiplexing / multiplexing section and a main control section. Thus, the normal channel in the second information highway connects the first information highway and the second information highway, and the specific channel in the second information highway and the effective channel in the third information highway, If the call information received by the call information receiving means (for example, the subscriber number or calling time of the caller) does not match a pre-registered condition (for example, the subscriber number or time zone), the first information highway is used. A call received by the call information receiving means that connects the second information highway If the broadcast matches the pre-registered conditions were to connect the third information highway to the first information highway.

[0008]

By taking such means, some of the plurality of channels set on the first information highway are notified via the subscriber line when an incoming call is received and received by the call information receiving means. If the call information does not match the pre-registered condition, the standard extension fixedly assigned to the specific channel of the second information highway is assigned, and if it does not match, the fixed extension to the effective channel of the third information highway is assigned. Is assigned to each of the plurality of channels set in the first information highway, and a standard extension fixedly assigned to the normal channel of the second information highway is always assigned to the others.

Therefore, although a plurality of channels set in the first information highway are basically assigned standard extensions that are fixedly assigned to each of them, some channels are preregistered with notified call information. The standard extension and the specific extension are selectively assigned depending on whether or not the specified conditions are met.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram showing the main configuration of the digital button telephone system according to this embodiment. In the figure, 1
Is a main device and includes 24 main extension lines 2 (2-1, 2-2 ..., 2-
23 extension telephones 3 (3-1,
3-2 ..., 3-23), but one via one single telephone extension 4
One FAX terminal 5 and one additional single telephone extension 7
One additional FAX terminal 8 is connected to the digital key telephone system.

The main unit 1 includes a station line interface section (station line I / F section) 11 and a main extension interface section (main extension I / F section).
F part) 12, single telephone interface part (SLT I
/ F section) 13, PCM highway channel demultiplexing / multiplexing section (hereinafter referred to as PCM A / D section) 14, time switch 15, main control section 16, additional single telephone extension interface section (additional SLT I / F section) 26 and a sender ID receiver (callID receiver) 27.

Eight office lines 6 (6-1 to 6-8) and a main PCM highway 17 are connected to the office line interface section 11. In this station line interface section 11, voice signals (analog) that arrive via each station line 6 are transmitted.
To a PCM code data signal, sending a PCM code data signal to a predetermined time slot on the main PCM highway 17, extracting a PCM code data signal arriving via a predetermined time slot on the main PCM highway 17,
A station line interface operation such as conversion into a voice signal (analog), state monitoring of the station line 6, or transmission of various signals to a network connected via the station line 6 is performed. In addition, the station line interface unit 11 controls the control line 18 (18-1 to 18-
Control information relating to the above-mentioned station line interface operation is exchanged with the main control unit 16 via 8). Station line 6-
Out of 1 to station lines 6-8, station line 6-1 is dedicated to FAX communication,
The station lines 6-8 are set for both normal voice communication and FAX communication. And other station line 6-2 ~ station line
6-7 is set for voice calls only.

The sender ID receiving section 27 is connected in parallel with the station line interface section 11 to the station line 6-8. The caller ID receiving unit 27 is a caller transmitted from the station side during the ringing tone pause period between the first incoming call ringing tone and the second incoming call ringing tone when an incoming call is received via the station line 6-8. ID
(Caller's telephone number, caller's name, etc.) is received and control line 2
8 to the main control unit 16.

A main extension 2 and a PCM highway 19 for the main extension are connected to the main extension interface section 12. The main extension interface unit 12 receives the PCM coded data signal coming via each of the main extensions 2, sends it to a predetermined time slot on the main extension PCM highway 19, and arrives via the PCM highway 19 for the main extension. Extension interface operations such as extraction of a PCM coded data signal, monitoring of the state of the main extension 2 and transmission of various signals to the extension telephone 3 are performed. Further, the main extension interface unit 12 exchanges control information relating to the extension interface operation with the main control unit 16 via the control data highway 20.

The single telephone line interface section 13 is connected to the single telephone line extension 4 and the main extension PCM highway 19. In the single telephone line extension interface section 13, a loop current is supplied to the single telephone line extension 4, a call signal is sent to the single telephone line extension 2, and a 2-line-
4-line conversion, conversion of a fax signal (analog) arriving via a single telephone extension 4 into a PCM code data signal, transmission of a PCM code data signal to a predetermined time slot on the PCM highway 19 for main extension, main extension Arriving via a predetermined time slot on the PCM highway 19
An extension interface operation such as extraction of a CM code data signal, conversion to a FAX signal (analog), or monitoring of the state of the individual telephone extension 4 is performed. Further, the single telephone line extension interface section 13 exchanges control information relating to the extension interface operation with the main control section 16 via the control data highway 20.

Additional single telephone telephone extension interface section 26
An additional single telephone extension 7 and an additional single telephone extension PCM highway 21 are connected to. The additional single telephone extension line interface unit 26 supplies the loop current to the additional single telephone extension 7 and the additional single telephone extension 7
Sending of a call signal to the PCM highway 21 for conversion of a fax signal (analog) arriving via the extension 7 of the additional single telephone to a PCM code data signal P to time slot
Sending of CM code data signal, PC for extension independent telephone extension
An extension interface operation such as extraction of a PCM coded data signal arriving via a predetermined time slot on the M highway 21 and conversion into a FAX signal (analog), or state monitoring of the extension 7 of the additional independent telephone is performed. The additional single telephone extension interface unit 26 exchanges control information relating to the extension interface operation with the main control unit 16 via the control data highway 20.

A main PCM highway 17, a main extension PCM highway 19 and an additional single telephone extension PCM highway 21 are connected to the PCM A / D section 14, respectively. The PCM A / D unit 14 is a main control unit 1.
PCM transmitted through the main extension PCM highway 19 based on a control signal given from the control line 6 through the control line 22.
The code data signal and the PCM code data signal transmitted through the additional single telephone extension PCM highway 21 are selected in time slot units and output to the main PCM highway 17. Further, the PCM A / D unit 14 transmits the PCM code data signal transmitted through the main PCM highway 17 in units of time slots to the main extension PCM highway 1 based on the control signal provided from the main control unit 16 via the control line 22.
9 and the additional single telephone extension PCM highway 21.

The time switch 15 switches the time slot of the PCM code data signal transmitted through the main PCM highway 17 based on the control data given from the main control section 16 through the control line 23, and the extension telephone 3, F
The AX terminal 5, the additional FAX terminal 8 and the office line 6 are arbitrarily exchanged and connected.

The main control section 16 is provided with, for example, a microcomputer as a main control circuit, and controls each section in order to realize the exchange operation. The main control unit 16 holds a telephone number registered in advance as a FAX communication partner in a built-in memory.

Reference numeral 24 is a synchronization signal line, and from the main control unit 16 to the main extension interface unit 12, the single telephone line extension interface unit 13, the additional single telephone line extension interface unit 26, the PCM A / D via the synchronization signal line 24.
A PCM highway frame synchronization signal is applied to the section 14 and the time switch 15. Main extension interface section 12, single telephone extension interface section 13, additional single telephone extension interface section 26, PCM A / D
Both the unit 14 and the time switch 15 are connected to the PC in synchronization with a frame synchronization signal given via a synchronization signal line.
Input and output of M code data signal. Therefore, the main PCM highway 17, the main extension PCM highway 19 and the additional single telephone extension PCM highway 21 are synchronized with each other.

FIG. 2 is a diagram showing a specific configuration of the main extension interface section 12. In the figure, reference numeral 31 is a demultiplexing circuit unit, which multiplexes the PCM code data signals arriving via each of the main extensions 2 (2-1 to 2-23) to P for the main extension.
Output to CM highway 19 and P for main extension
The PCM code data signal to be output to each of the main extensions 2 is extracted from the signal arriving via the CM highway 19 and output to the corresponding main extension 2. The demultiplexing / demultiplexing circuit unit 31 transmits / receives data to / from the extension telephone 3 by a ping-pong method, and the AMI-encoded signal is transmitted via the transformer 32 (32-1 to 32-23) to the main extension line. The AMI code signal that has been output to the main line 2 is converted to an NRZ code signal by the operational amplifier 33 (33-1 to 33-23) and then input.

Reference numeral 34 is a control unit for controlling the main extension interface unit 12, which is a control data highway 2
0 and the buffer 35, while transmitting and receiving various control data to and from the main control unit 16, the demultiplexing circuit unit 3
1 is controlled. The control unit 34 also exchanges various information with the extension telephone 3 via the demultiplexing circuit unit 31, the transformer 32, the operational amplifier 33, and the main extension 2.

FIG. 3 shows an extension interface section 1 for a single telephone.
3 is a diagram showing a specific configuration of a telephone extension interface unit 3 and an extension single telephone extension unit 26. FIG. As shown in this figure, the single telephone line interface unit 13 and the additional single telephone line interface unit 26 include constant current circuits 39-1 and 39-2, ringing signal oscillator 40, relay contacts 41-1 and 41-2, ring trip. Circuit (RT) 42, relay 43, transistor 44, transformer 45, hybrid circuit (HYB) 4
6, codec 47, demultiplexing circuit section 48, control section 4
9 and buffer 50.

The constant current circuits 39-1 and 39-2 have T terminals and R terminals.
A loop current is supplied to the individual telephone extension 4 or the additional individual telephone extension 7 connected to the terminal. The constant current circuit 39-2
Detects the on / off hook of the FAX terminal 5 or the additional FAX terminal 8 and the dial pulse sent from the FAX terminal 5 or the additional FAX terminal 8, and notifies the control unit 49.

The call signal oscillator 40 has a relay contact 41.
When it is connected to the R terminal by -1, it sends a calling signal to the extension 4 of the individual telephone or the extension 7 of the additional telephone. The ring trip circuit 42 detects the response of the FAX terminal 5 or the additional FAX terminal 8 from the state of the individual telephone extension 4 or the additional individual telephone extension 7 when connected to the T terminal by the relay contact 41-2, and the control unit Notify 49.

The relay contacts 41-1 and 41-2 are the transistors 4
4 is opened / closed by a relay 43 driven by being opened / closed by the control unit 49, the relay contact 41-1 calls the R terminal to either the signal oscillator 40 or the transformer 45, and the relay contact 41-2 is the T terminal. Are connected to either the ring trip circuit 42 or the transformer 45, respectively.

The hybrid circuit 46 exchanges the signal form between the two-line type of the single telephone extension 4 or the additional single telephone extension 7 side and the four-wire type of the main extension PCM highway 19 or the additional single telephone extension PCM highway 21 side. Convert.

The codec 47 arrives via the single telephone extension 4 or the additional single telephone extension 7, and the transformer 45
And an analog FAX signal fetched through the hybrid circuit 46 is converted into a PCM code data signal.
In addition, the codec 47 outputs the PCM coded data signal extracted and provided by the demultiplexing circuit unit 48 as an analog F signal.
It is converted into an AX signal and given to the hybrid circuit 46.

The demultiplexing circuit section 48 includes a codec 47.
The PCM code data signal given from the main extension PCM
It is sent to a predetermined time slot on the highway 19 or the PCM highway 21 for the extension of the additional independent telephone. Also, the demultiplexing circuit unit 48 is used for the main extension PCM highway 1
9 or a PCM code data signal on a predetermined time slot on the PCM highway 21 for the extension of an additional single telephone is extracted and given to the codec 47.

The control section 49 controls the control data highway 20.
The control of the transistor 44 and the demultiplexing / demultiplexing circuit unit 48 is performed while exchanging various control data with the main control unit 16 via the buffer 50.

FIG. 4 is a diagram showing a specific configuration of the PCM A / D unit 14. As shown in this figure, PCM A / D
The section 14 includes 4-bit counters 51 and 52 and an inverter 5.
3, parallel output type serial shift register 54, D
Flip-flop 55, inverter 56, OR gate 5
7, AND gate 58 and multiplexer 59, 6
It is composed of 0,61.

The 4-bit counters 51 and 52, the inverter 53, the serial shift register 54, the D flip-flop 55, the inverter 56 and the OR gate 57 generate a signal which becomes "H" only during a predetermined time slot period, and AND It is given to the gate 58.

The AND gate 58 outputs the signal supplied from the OR gate 57 only when the additional FAX terminal selection signal supplied from the main controller 16 via the control line 22 is "H". The output of the AND gate 58 is given to the select terminals of the multiplexers 59, 60 and 61, respectively.

In the multiplexer 59, the data given from the main extension interface section 12 to the input terminal A via the main extension PCM highway 19 and the input terminal B to the addition only via the telephone extension PCM highway 21 are added. The data supplied from the telephone extension interface section 26 are respectively inputted, and when the output of the AND gate 58 is "L", the data inputted to the input terminal A and the output of the AND gate 58 are "H". At times, the data input to the input terminal B is selected and output to the main PCM highway 17.

In the multiplexer 60, "H" data is input to the input terminal A and data is input to the input terminal B via the main PCM highway 17, respectively.
When the output of the D gate 58 is "L", the input terminal A
To the PCM highway 21 for the extension of the additional independent telephone, respectively, when the output of the AND gate 58 is "H".

The multiplexer 61 has a main terminal P connected to the input terminal A.
Data is input again via the CM highway 17 and input terminal B
"H" data is input to each of the input terminals, the data input to the input terminal A when the output of the AND gate 58 is "L", and the input terminal when the output of the AND gate 58 is "H". The "H" data input to B is selected, and the main extension PCM highway 19
Output to.

Next, the operation of the digital key telephone device configured as described above will be described. First, in a normal state, the main control unit 16 sets the additional FAX terminal selection signal given to the PCM A / D unit 14 to "L". Therefore, in the PCM A / D unit 14, the AND gate 58
Is closed and its output is always "L" regardless of the output of the OR gate 57. Therefore, the multiplexer 59
Arrives via the PCM highway 19 for the main extension
The CM code data signal is output to the main PCM highway 17. Further, the multiplexer 60 outputs "H" data to the PCM highway 21 for the extension of the additional single telephone.
The multiplexer 61 is connected to the main PCM highway 17
The PCM code data signal coming via the
Output to M highway 19.

Thus, the PCM A / D unit 14 is the main PC.
The M highway 17 and the main extension PCM highway 19 are connected to each other, and the additional single telephone extension PCM highway 21 is disconnected.

Now, in the main extension interface section 12,
A PCM code data signal transmitted in the transmission format shown in FIG. 5 from the extension telephone 3 via the main extension 2 is received, and the PCM code data signal is transmitted to the PCM highway 1 for the main extension.
It is sending to 9. Main PCM highway 17,
In the PCM highway 19 for the main extension and the PCM highway 21 for the extension of the additional independent telephone set, 32 time slots are set per frame as shown in FIG. 6, and the PCM highway 19 for the main extension has these 32 time slots. For example, as shown in FIG. 7, each of the extension telephone 3 and the FAX terminal 5 is fixedly assigned to the slot. Then, the main extension interface unit 12
The CM code data signal is sent to the main extension PCM highway 19 in the time slot corresponding to the extension telephone 3 that is the output source. In this way, the PCM code data signal sent from the main extension interface unit 12 to the main extension PCM highway 19 is time-switched via the main extension PCM highway 19, the PCM A / D unit 14 and the main PCM highway 17. It is given to 15.

Also, the single telephone extension interface unit 1
In No. 3, the FAX signal coming from the FAX terminal 5 via the single telephone extension 4 is received and converted into the PCM code data signal by the codec 47, and this PCM code data signal is sent to the PCM highway 19 for the main extension. . Here, in the main extension PCM highway 19, as shown in FIG. 7, the time slot with the time slot number "17" is F.
Since it is assigned to the AX terminal 5, the single-telephone extension unit 13 sends out the PCM code data signal in this time slot. In this way, from the single telephone extension interface unit 13 to the main extension PC
The PCM coded data signal sent to the M highway 19 is given to the time switch 15 via the main extension PCM highway 19, the PCM A / D unit 14 and the main PCM highway 17.

On the other hand, in the office line interface section 11, 3
For example, as shown in FIG. 8, each of the station lines 6 is fixedly assigned to the two time slots, and after converting the signal arriving via the station line 6 into a PCM code data signal, the corresponding time Send to the main PCM highway 17 in the slot. The PCM code data signal thus sent from the station line interface unit 11 to the main PCM highway 17 is given to the time switch 15 via the main PCM highway 17.

The time switch 15 replaces the PCM coded data signal that has arrived via the main PCM highway 17 with the time slot corresponding to the connection destination, and switches the main PC.
Output to M highway 17. Thus, the PCM code data signal output from the time switch 15 is the main P
Station line interface section 11 via the CM highway 17
In addition, the main PCM highway 17 and PCM A / D unit 1
4 and the main extension PCM highway 19 to the main extension interface unit 12. At this time, since the PCM highway 21 for extension of the additional single telephone is separated by the PCM A / D unit 14, the time switch 15
The PCM coded data signal output from is not given to the single telephone line interface unit 13.

Thus, in the above-mentioned state, the extension telephone 3 and the office lines 6-2 to 6-7 are arbitrarily switched and connected. In addition, the station line dedicated to FAX communication
6-1 is in a state where exchange connection is performed with the FAX terminal 5 as necessary.

When an incoming call arrives at the central office line 6-8, the sender ID receiver 27 receives the sender information, and the control line 28
To the main control unit 16 via. That is, the telephone network to which the digital key telephone system of the present embodiment is connected is designed to superimpose the caller ID on the calling signal as shown in FIG. The ringing signal is a signal in which a ringing sound of 20 Hz appears repeatedly with a ringing stop period of 4 seconds, and a caller in the format shown in FIG. 9 goes through a pause of 0.5 seconds after the end of the first ringing sound. I
The signal obtained by modulating D is superimposed. Therefore, the sender ID receiver 27 receives this sender ID.

When the caller ID is transferred from the caller ID receiving section 27, the main control section 16 stores the caller telephone number indicated in the caller ID in advance and holds the FAX. The telephone number of the communication partner is compared and checked, and if they do not match, the above-mentioned operation is performed and the extension line 6-8 is exchanged and connected to an optional extension telephone 3.

However, when the caller's telephone number indicated in the caller's ID matches the telephone number of the FAX communication partner registered and held in advance, the main control section 16 sends a control line 22. The additional FAX terminal selection signal given to the PCM A / D unit 14 is set to "H". Then PC
In the M / D unit 14, the AND gate 58 opens, and the output of the shift register 54 is the multiplexers 59, 60, 6
It is supplied to the select terminal of 1.

Here, the 4-bit counters 51 and 52, the inverter 53, the parallel output serial shift register 54, the D flip-flop 55, and the inverter 56 of the PCM A / D unit 14 have the time slot number "1" shown in FIG.
A signal which becomes "H" is generated only in the time slot of the 6 "time slot and is output from the OR gate 57. Therefore, in the time slot of the time slot number" 16 ", the multiplexer 59 outputs The PCM coded data signal arriving via the PCM highway 21 for the extension of the additional independent telephone set is sent to the main PCM highway 17.
Further, the multiplexer 60 sends the PCM coded data signal coming through the main PCM highway 17 to the PCM highway 21 for the additional telephone extension, and the multiplexer 61 sends the "H" data to the PCM highway 1 for the main extension.
Output to 9 respectively.

Thus, the PCM A / D unit 14 is provided with the main PCM highway 17 and the additional independent telephone extension P only in the time slot of the time slot number "16".
PCM for main extension by connecting with CM highway 21
Highway 19 is separated.

Further, in the PCM highway 21 for the extension of the additional single telephone, the additional FAX terminal 8 is fixedly assigned to the time slot of the time slot number "16" of the 32 time slots as shown in FIG. ing. Then, the extension independent telephone interface unit 2
6 transmits the PCM code data signal to the PCM highway 21 for the extension of the additional independent telephone in the time slot of the time slot number "16". Therefore, PC
As described above, the M / D unit 14 uses the main PCM highway 17 and the PCM highway 21 for the extension of the additional independent telephone only in the time slot of the time slot number "16".
If they are connected to each other, the PCM code data signal sent from the additional single telephone extension line interface unit 26 to the additional single telephone extension PCM highway 21 is the PCM highway 21 for the additional single telephone extension, PCM A /
It is given to the time switch 15 via the D section 14 and the main PCM highway 17.

At this time, the main control section 16 notifies the control section 49 of the additional single telephone interface section 26 of the incoming call via the control data highway 20. Then, the control unit 49 of the additional single telephone interface unit 26
Turns on the transistor 44 to drive the relay 43,
While connecting the calling signal oscillator 40 to the R terminal,
The ring trip circuit 42 is connected to the T terminal. As a result, the call signal output from the call signal oscillator 40 is sent to the extension 7 of the additional single telephone, and the additional FAX terminal 8 is called.

In response to this, when the additional FAX terminal 8 responds, this is detected by the ring trip circuit 42 and notified to the control unit 49. Then, the control unit 49 informs the control data highway 2 that the additional FAX terminal 8 has responded.
Notify the main control unit 16 via 0.

The main control unit 16 receives the additional FAX from the control unit 49.
When the notification of the response from the terminal 8 is received, the station line interface unit 11 is controlled to the response / communication state regarding the station line 6-8.
Further, the main control unit 16 controls the time switch 15 so that the time slot with the time slot number “16” is assigned to the station line 6-8.
Connect to the assigned time slot. As a result, the additional FAX terminal 8 can perform FAX communication via the office line 6-8.

Thus, according to the present embodiment, on the main PCM highway 17, as shown in FIG. 11, the time slot of the time slot number "16" of the 32 time slots is added to the extension telephone 3-23. It can be shared with the FAX terminal 8, and the traffic capacity relating to FAX communication can be increased without adding a line dedicated to FAX communication.

In addition, in this embodiment, since the time slot is fixedly assigned to any terminal, in the time slot to which a plurality of terminals are assigned, any one of a plurality of corresponding terminals is selected. Only a very simple process that effectively validates is performed, and no complicated process of monitoring an empty channel or allocating a time slot is required.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, which of the channels to which the extension telephone 3 and the additional FAX terminal 8 are assigned is selected as to whether or not the telephone number of the caller indicated by the caller ID matches the one registered in advance. However, it may be determined based on the collation result of other information included in the sender ID. That is, for example, the station line 6 and the additional FAX terminal 8 may be connected when the calling time included in the caller ID belongs to a time zone registered in advance. In this way, it becomes possible to switch the station line 6 between the voice call exclusive use and the FAX communication exclusive use depending on the time zone. Alternatively, it may be determined whether or not the caller name indicated by the caller ID matches the one registered in advance.

Further, the time management of the above modification may be combined with the above-described embodiment. That is, the telephone number included in the caller ID matches the telephone number registered in advance,
And if the calling time included in the caller ID belongs to a pre-registered time zone, the station line 6 and the additional FAX terminal 8 are connected, and the telephone number included in the caller ID is registered in advance. If the calling time included in the caller ID does not belong to the time zone registered in advance, the central office line 6 and the extension telephone 3 are connected even if they match.

The number of channels on the PCM highway,
The number of extension telephones 3, the number of FAX terminals 5, the number of additional FAX terminals 8 and the number of office lines 6 may be arbitrary. Moreover, the number of station lines dedicated to FAX communication and the number of station lines used for both voice communication and FAX communication may be arbitrary. However, when a plurality of office lines for both voice communication and FAX communication are set, it is necessary to provide the caller ID receiver 27 for each of the applicable office lines. In addition, various modifications can be made without departing from the scope of the present invention.

[0058]

According to the present invention, a plurality of channels similar to the first information highway such as the main PCM highway are set, and a part of predetermined channels of the plurality of channels are set as the specific channels. , Etc. are set as normal channels, and standard extensions such as a main extension and a single telephone extension are fixedly assigned to each of the plurality of channels, and a second information highway such as a PCM highway for the main extension, A plurality of channels similar to those of the first information highway are set and are synchronized with the second information highway, and only a predetermined effective channel having the same timing as the specific channel among the plurality of channels is set, for example. A specific extension such as an additional single telephone extension is fixedly assigned, for example, an additional specific telephone extension P A third information highway such as the M highway and a call information receiving means such as a caller ID receiving unit that receives call information such as a caller ID notified via a subscriber line such as a station line; An information highway control unit including a PCM highway channel demultiplexing / multiplexing unit and a main control unit is provided, and by the information highway control unit, the first information highway and the second information highway in the normal channel in the second information highway. And the call information received by the call information receiving means (for example, the subscriber number and the calling time of the caller) on the specific channel of the second information highway and the valid channel of the third information highway. Is not consistent with pre-registered conditions (eg subscriber number or time zone) The second information highway is connected to the first information highway, and when the call information received by the call information receiving means matches a condition registered in advance, the third information highway is added to the first information highway. Therefore, the digital button telephone apparatus can secure a large traffic capacity for communication of the specific terminal while keeping the number of dedicated office lines for the specific terminal to a small number.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a main configuration of a digital key telephone device according to an embodiment of the present invention.

2 is a diagram showing a specific configuration of a main extension interface section 12 in FIG.

FIG. 3 is a single telephone line interface unit 13 in FIG.
6 is a diagram showing a specific configuration of an extension single telephone extension interface unit 26. FIG.

4 is a diagram showing a specific configuration of a PCM A / D unit 14 in FIG.

5 is a diagram showing a PCM code data signal transmission format in a main extension 2. FIG.

FIG. 6 is a diagram showing a frame configuration of a main PCM highway 17, a main extension PCM highway 19 and an additional single telephone extension PCM highway 21.

FIG. 7 is a diagram showing a time slot allocation state in the main extension PCM highway 19;

FIG. 8 is a diagram showing a time slot allocation state corresponding to the office line 6 in the main PCM highway 17.

FIG. 9 is a diagram showing a data format of a call signal arriving via a station line 6 and a caller ID superimposed on the call signal.

FIG. 10: PCM highway 21 for extension of an additional single telephone
FIG. 7 is a diagram showing a time slot allocation state in FIG.

FIG. 11 is a diagram showing an overall time slot allocation state in the main PCM highway 17.

[Explanation of symbols]

1 ... Main device 2 (2-1 to 2-23) ... Main extension 3 (3-1 to 3-23) ... Extension telephone 4 ... Independent telephone extension 5 ... FAX terminal 6 (6-1 to 6-8) ... Station line 7 ... Additional individual telephone line extension 8 ... Additional FAX terminal 11 ... Station line interface section (station line I / F section) 12 ... Main extension interface section (Main extension I / F section) 13 ... Independent telephone interface section (SLT I) / F
14) PCM highway channel demultiplexing / multiplexing unit (PC
MA / D section) 15 ... Time switch 16 ... Main control section 17 ... Main PCM highway 18 (18-1 to 18-8), 22, 23, 28 ... Control line 19 ... Main extension PCM highway 20 ... Control data Highway 21 ... PCM highway for extension of an additional single telephone 24 ... Synchronous signal line 26 ... Extension of single telephone extension interface unit (additional SL
T I / F section) 27 ... Caller ID receiving section (call ID receiving section)

Claims (3)

[Claims] 1. A connection to a subscriber line of a communication network having a function of notifying a callee of predetermined call information concerning the call, and the first information highway having a plurality of channels set is transmitted. In the digital button telephone apparatus for arbitrarily exchanging and connecting the subscriber line, the predetermined standard extension, and the predetermined specific extension different from the standard extension by exchanging the information by the exchanging means, the same as the first information highway. Multiple channels are set, some predetermined channels of the plurality of channels are set to specific channels, and others are set to normal channels, and the standard extension is fixed to each of the plurality of channels. And a plurality of channels similar to those of the first information highway are set and the second information highway is set. A specific extension of which is fixedly assigned to the specific channel of the second information highway only in a predetermined effective channel which is in synchronization with B and is at the same timing as the specific channel of the plurality of channels. 3 information highway, call information receiving means for receiving the call information notified via the subscriber line, the first information highway and the second information highway in the normal channel in the second information highway When the call information received by the call information receiving means does not match the pre-registered condition on the specific channel in the second information highway and the effective channel in the third information highway, the connection is established. The first information highway is connected to the second information highway and is received by the call information receiving means. A digital button telephone device, comprising: information highway control means for connecting the third information highway to the first information highway when the received call information matches a pre-registered condition. 2. The information highway control means determines a specific channel in the second information highway and a third information highway depending on whether or not the subscriber number of the caller included in the call information matches a number registered in advance. 2. The digital key telephone device according to claim 1, wherein it is determined which of the second information highway and the third information highway is connected to the first information highway on the effective channel in. 3. The information highway control means selects a specific channel in the second information highway and an effective channel in the third information highway according to whether or not the calling time included in the call information belongs to a pre-registered time zone. First
3. The digital button telephone device according to claim 1, wherein it is determined which one of the second information highway and the third information highway should be connected to the information highway.